text: In the years following World War II, eight countries have conducted nuclear tests with 2475 devices fired in 2120 tests. In 1963, the United States, Soviet Union, and United Kingdom signed the Limited Test Ban Treaty, pledging to refrain from testing nuclear weapons in the atmosphere, underwater, or in outer space. The treaty permitted underground tests. Many other non-nuclear nations acceded to the Treaty following its entry into force; however, France and China (both nuclear weapons states) have not.
  The primary application to date has been military (i.e. nuclear weapons), and the remainder of explosions include the following:
  * Nuclear pulse propulsion, including using a nuclear explosion as asteroid deflection strategy.
  * Power generation; see PACER
  * Peaceful nuclear explosions